Boat-knee



D. TRUE. BOAT KNEE.

(No Model.)

Patentd July 10, 1883.

vx/rrmhzaaas a ww ' UNITED STATES ATENT I OFFICE.

DAVID TRUE, OF SALISBURY, MASSACHUSETTS SPECIFICATION forming part ofLetters Patent No. 280,884, dated July 10, 1883.

' Application filed Marchl'l, use. (No model.)

To all whom it may concern:

Be it known that I, DAVID TRUE, of Salis' bury, in the county of Essexand State of Massachusetts, have invented new and useful Improvements inBoat-Knees, of which the following is a specification.

This invention relates to that class of boatknees made in two (or more)parts and held together at the adj acent or adjoining portions of saidparts, and is applied more particularly to knees used in theconstruction of dories and similar craft.

In the accompanying drawings, in which similar letters of referenceindicate like parts,

Figure 1 isa view in perspective of a portion of a boat-knee embodyingmy invention. Fig. 2 is a plan view of the knee, with one of the platesmoved out of position. Fig. 3 is a horizontal section online as as,Fig. 1. Fig. 4 is a view in perspective of one of the plates removed.Fig. 5 is a similar view of a modification.

A and B represent the two main portions of the knee, meeting at the bendand held firmly and immovably together by the means below described.Each of the portions A and B is provided with vertical or nearlyvertical grooves a, cut in its sides, as shown.

C G are strong metallic plates, provided pref o erably, but notnecessarily, with flanges C.

On the inner sides or surfacesof these plates C are beads or tenons b,from which project teeth I). The width or depth of the tenons b from thecommencement of the teeth to the 5 surface of the plate is equal to thedepth of the grooves a. The plates 0 are placed with the teeth I) in thegrooves a, and then by blows or pressure the teeth are forced into thewood forming the bottoms or inner sides of the 0 grooves until the mainportions 2) of the tenons fill the grooves, thus bringing the plates 0against the knee, in which position they are held by any suitable means,but preferably by means of the rivets (Z, passing through the plates andknee. The teeth Z2 being tightly 5 wedged in the wood, the two parts ofthe knee cannot be wrenched apart or started by any strain to which theycan be subjected while they are in position in a boat.

In the modification. shown in Fig. 5 there is no tenon, but the rows ofteeth project directly from the plate. As there is no tenon in theplate, there need be no grooves in the knee, as the teeth may be forceddirectly into the side of the knee.

One or more rows or series of teeth may be placed on each side of theplate, and the teeth may, as above indicated, project from a tenon, ordirectly from the surface of the plate, while the knee may be providedwith grooves or not. The teeth may be more or less in number, and therows may extend in any direction.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is r 1. In a boat-knee, the combination, withthe two portionsA B thereof, of one or more plates provided with rows orseries of teeth adapted to be forced into the said portions of the kneeand secured thereto by suitable means, substantially as and for thepurpose set forth.

2. In a boat-knee made in two or more. parts, the combination, with saidparts, of a plate extending across the dividing'line between the innerends of two of said parts, said plate be- 7 5 ing provided with teethadapted to hold, or assist to hold, the said parts from being wrenchedapart, and secured thereto by suitable means, substantially as and forthe purpose described.

3. The combination, with the parts A B, provided with the grooves a, ofthe plate 0, provided with 'the tenons I) and teeth 1), substantially asand for the purpose set forth.

DAVID TRUE.

' \Vitnesses:

HENRY W. WILLIAMs, J osnrrr ISHBAUGH.

